Some of the important changes for Period 110 are summarised here:

• In Period 110, ESO is introducing Distributed Peer Review (DPR) for proposals requesting a total time (including overheads) of less than 16 hours. Exceptions to this general rule are proposals including at least one ToO run, proposals for Calibration Programmes, and DDT proposals. All other proposals submitted for the regular cycle will be reviewed in the classical way by the OPC and the panels. In this paradigm, PIs of proposals qualifying for DPR accept to review ten proposals submitted by their peers. Correspondingly, they accept that their proposals are reviewed by ten peers who have also submitted proposals in Period 110. Users should thus familiarise themselves with the DPR rules and guidelines.
• Starting in Period 110, a new set of scientific keywords replaces the OPC categories. Users must select at least two keywords, and at most five keywords (ten for Large Programmes). The keywords must be selected in decreasing order of relevance (i.e., the first selected keyword is the most relevant).
• Applicants are reminded that the Dual-Anonymous Peer Review is fully deployed since Period 108. Applicants must prepare their proposals following the anonymisation rules and examples described in this link.
• Starting with Period 110, a new dual-field wide observing mode with GRAVITY is offered for the UTs and the small and astrometric configurations of the ATs. This mode allows fringe tracking from a target that is up to 30 arcsec away from the science target by using the VLTI Star Separators to separate the beams. Further details can be found on the GRAVITY webpages.
• Due to the schedule for installation of 4MOST on VISTA, VIRCAM is no longer offered, and any available time in Period 110 will be used to complete ongoing programmes. Nevertheless, the instrument is expected to be available for DDT proposals during part of Period 110.
• The visitor focus of the 3.6-metre telescope is not offered during Period 110 due to the installation and commissioning of NIRPS. However, NTT, APEX and the Nasmyth A focus of UT1 are available for a Visitor Instrument. Further, two visitor foci for an interferometric instrument are available in the VLTI laboratory. Interested users should consult Section 3 of the Call for Proposals document.
• ESO will no longer offer APEX observing time after Period 110.